HVAC for High voltage direct Current (HVDC)

Courtesy ABB

High-voltage, direct current (HVDC) is an electrical transmission technology that uses direct current (DC) voltages greater than the nominal system voltage in order to increase power transfer capacity. The higher voltages allow for more efficient transmission of electrical power over long distances.

A high-voltage, direct current (HVDC) electric power transmission system uses direct current (DC) for the bulk transmission of electrical power

An HVDC is situated in a Faraday cage used to protect electronic equipment from high voltage direct current (HVDC) electromagnetic fields. The cage surrounds the equipment and prevents the HVDC fields from reaching it. The cage is made of conductive material, such as metal, and is typically grounded.

HVDC Transmission Map

HVAC Design as Such

• HVDC (high voltage DC supply) is mainly used for long distances to minimise power loss.

• The converter/rectifier hall is 1 big faradays cage designed hall with no entry to personnel during normal operations.

• All indoor M&E equipment must be grounded.

• Only ventilation is required except for high temp regions like the gulf.

• Should have N+2 configuration for redundancy.

• AHU sections are, Heating coil, humidifier, pre-filter + bag filter.

• Fresh air at 100 % with 30 Pascals pressurisation and with gravity release dampers at upper levels of the converter hall.

• Interior design Maximum 48 C minimum 5 C, maximum supply temp. 40 c and minimum at 10c, maximum Relative humidity RH 60% and minimum 30%

• Heat losses on Average 300 KW, including Process piping.

• 500 Lux uniform for Lighting.

• For security, entrance doors are interlocked for power shutdown in case of fire.

• Fire fighting, manual extinguishers at entry and automatic interior extinguishing on the interior for the controls room.

• BMS: all sensors, High Temp & Low temp, high & low humidity etc... to connect to Controls room.

• I can be consulted on this and help you achieve your goals Remotely or onsite.

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• Cool Air Conditioners
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Conclusion High-voltage, direct current (HVDC) is a type of electrical power transmission that uses direct current (DC) instead of alternating current (AC). HVDC allows for the transmission of electricity over long distances with minimal losses.

Charles Nehme,

HVAC Global consultant and educator.

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